A method for reducing drag by laser shock molding on the surface of a car body
A technology of laser shock and car body, which is applied in the direction of laser welding equipment, manufacturing tools, vehicle parts, etc., can solve the problem of few non-smooth surface processing methods of car body, and achieve the effect of increasing strength and improving flow direction
Active Publication Date: 2016-09-21
HUAWEI TEHCHNOLOGIES CO LTD
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Problems solved by technology
At home and abroad, there are many studies on the effect and principle of non-smooth body drag reduction, but there are few methods for processing the non-smooth surface of the body.
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Embodiment Construction
[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] A method for reducing drag by laser impact modeling on the surface of a vehicle body. The vehicle body model used is an aluminum alloy sheet material that is scaled down with the actual vehicle model. The embodiment takes the processing of the vehicle body roof 5 as an example, and its processing device is as follows figure 1 As shown, it includes a laser 1 and a focusing lens 3, and the laser beam 2 emitted by the laser 1 is irradiated on the vehicle body roof 5 to be processed through the focusing lens 3, including the following steps:
[0020] 1) First, polish the roof 5 of the vehicle body, then clean it and dry it, spray black paint with a thickness of about 0.1mm on its surface evenly as an energy absorbing layer, and set a 3mm thick running water on the energy absorbing layer 4 as a constraint layer;
[0021] 2) Next, fix the roof 5 of the vehicle body t...
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Abstract
The invention discloses a vehicle body surface laser impact modeling and resistance reducing method. The method specifically includes the following steps of polishing the surface of a vehicle body, evenly spraying an absorption layer material on the surface of the vehicle body, making flowing water serve as a restraint layer, focusing laser beams emitted by a laser device on the surface of the vehicle body through a lens, and finally machining a series of pit arrays in the surface of the vehicle body. By means of the method, strong lasers with high energy and short pulse act on the surface of the vehicle, an absorption layer covering the surface absorbs energy of the lasers to be evaporated, evaporated steam rapidly absorbs energy of the lasers to form plasmas so that explosions can happen and momentum pulses can be produced, strong impact waves are transmitted into the material under the effect of the restraint layer, the impact force of the impact waves serves as the plastic deformation force of the material, plastic deformation of the surface of the material is achieved, and regular pits can be formed in the surface of the vehicle body.
Description
technical field [0001] The invention relates to the field of automobile non-smooth surface processing, in particular to a method for reducing drag by laser impact molding on the surface of a vehicle body. Background technique [0002] With the continuous development of my country's road transportation and the popularization of automobiles, the total number of automobiles is increasing rapidly, and energy consumption has increased significantly. At the same time, environmental problems have become increasingly severe. According to relevant data, by the end of 2014, the consumption of gasoline and diesel for automobiles accounted for about 55% of the national consumption of gasoline and diesel. When the vehicle speed exceeds 60km / h, the power and fuel consumption used to overcome air resistance account for 30% to 40% of the total driving power and fuel consumption. Therefore, reducing the air resistance in the process of driving a car is an important method to reduce costs an...
Claims
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IPC IPC(8): B23K26/18B23K26/352
CPCB23K26/18B23K26/356B23K2101/006
Inventor 樊玉杰戴毅斌郭二彬崔鹏飞唐德业
Owner HUAWEI TEHCHNOLOGIES CO LTD